Android and iOS Developer

Title: Android and iOS Developer

Location: Washington DC / Milford, OH - 100% Onsite from day1

Duration: Fulltime contract

Job Description:-

Android Developer

We are seeking a highly skilled Android Developer with deep hands-on experience in building digital wallet,

payment, location-based, and proximity interaction features using UWB and NFC technologies.

Key Responsibilities:

Wallet & Payments:

Implement Google Wallet integrations including passes, offers, loyalty cards, transit passes, and identity flows.

Develop Google Pay payment flows including payment tokenization, merchant validation, and secure transaction

handling.

Integrate with payment gateways and implement validation, error handling, and reconciliation.

Develop mapping features using Google Maps SDK and Location Services API.

Implement geofencing, background location tracking, and fused location optimization.

Build custom map layers, clustering, markers, and real-time route visualizations.

Build device-to-device ranging and proximity-aware experiences using Android Nearby UWB APIs.

Implement secure session establishment, peer discovery, and precise distance/angle measurement.

Develop NFC features using HCE and Reader/Writer Mode.

Implement NDEF reading/writing, tag interactions, and secure element usage.

General Android Engineering:

Write modular Kotlin code using MVVM or Clean Architecture.

Build reusable components and secure, efficient features.

Apply accessibility, performance optimization, and robust error handling.

BLE experience.

Knowledge of tokenization, PCI compliance, and secure payment flow design.

Experience with modular apps, analytics, crash reporting, and CI/CD.

iOS Developer

8+ years of iOS experience.

Strong in Swift, PassKit, Apple Pay, MapKit, CoreLocation, NearbyInteraction, CoreNFC.

Experience in secure coding, API integrations, and CI/CD.

Roles & Responsibilities

Role Summary:

We are looking for an experienced iOS Developer with deep, hands-on expertise in building payments and wallet

experiences, location and maps-based features, and proximity/secure interactions using UWB and NFC capabilities

on iOS.

Key Responsibilities:

Build Wallet-integrated experiences using PassKit.

Implement Apple Pay flows and secure payment transactions.

Integrate with payment gateways and implement validation, error handling, and reconciliation.

Develop mapping features using Google Maps SDK and Location Services API.

Implement geofencing, background location tracking, and fused location optimization.

Build custom map layers, clustering, markers, and real-time route visualizations.

Implement UWB-based interactions using NearbyInteraction.

Create NFC-based tap interactions using CoreNFC.

Write clean, testable Swift code and follow secure architecture principles.

BLE experience.

Knowledge of payment compliance and secure transaction patterns

Diverse Lynx LLC is an Equal Employment Opportunity employer. All qualified applicants will receive due consideration for employment without any discrimination. All applicants will be evaluated solely on the basis of their ability, competence and their proven capability to perform the functions outlined in the corresponding role. We promote and support a diverse workforce across all levels in the company.